MdeModulePkg/Library/AuthVariableLibNull/AuthVariableLibNull.c

/** @file
  Implements NULL authenticated variable services.

Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution.  The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#include <Library/AuthVariableLib.h>
#include <Library/DebugLib.h>

/**
  Initialization for authenticated varibale services.
  If this initialization returns error status, other APIs will not work
  and expect to be not called then.

  @param[in]  AuthVarLibContextIn   Pointer to input auth variable lib context.
  @param[out] AuthVarLibContextOut  Pointer to output auth variable lib context.

  @retval EFI_SUCCESS               Function successfully executed.
  @retval EFI_INVALID_PARAMETER     If AuthVarLibContextIn == NULL or AuthVarLibContextOut == NULL.
  @retval EFI_OUT_OF_RESOURCES      Fail to allocate enough resource.
  @retval EFI_UNSUPPORTED           Unsupported to process authenticated variable.

**/
EFI_STATUS
EFIAPI
AuthVariableLibInitialize (
  IN  AUTH_VAR_LIB_CONTEXT_IN   *AuthVarLibContextIn,
  OUT AUTH_VAR_LIB_CONTEXT_OUT  *AuthVarLibContextOut
  )
{
  //
  // Do nothing, just return EFI_UNSUPPORTED.
  //
  return EFI_UNSUPPORTED;
}

/**
  Process variable with EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS/EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS set.

  @param[in] VariableName           Name of the variable.
  @param[in] VendorGuid             Variable vendor GUID.
  @param[in] Data                   Data pointer.
  @param[in] DataSize               Size of Data.
  @param[in] Attributes             Attribute value of the variable.

  @retval EFI_SUCCESS               The firmware has successfully stored the variable and its data as
                                    defined by the Attributes.
  @retval EFI_INVALID_PARAMETER     Invalid parameter.
  @retval EFI_WRITE_PROTECTED       Variable is write-protected.
  @retval EFI_OUT_OF_RESOURCES      There is not enough resource.
  @retval EFI_SECURITY_VIOLATION    The variable is with EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS
                                    or EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACESS
                                    set, but the AuthInfo does NOT pass the validation
                                    check carried out by the firmware.
  @retval EFI_UNSUPPORTED           Unsupported to process authenticated variable.

**/
EFI_STATUS
EFIAPI
AuthVariableLibProcessVariable (
  IN CHAR16         *VariableName,
  IN EFI_GUID       *VendorGuid,
  IN VOID           *Data,
  IN UINTN          DataSize,
  IN UINT32         Attributes
  )
{
  ASSERT (FALSE);
  return EFI_UNSUPPORTED;
}